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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OMZSQBSGK4MSCU5FUEVPG2MIBDGB26FM/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "OMZSQBSGK4MSCU5FUEVPG2MIBDGB26FM",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OMZSQBSGK4MSCU5FUEVPG2MIBDGB26FM/",
    "sender": {
        "address": "nsp25 (a) cornell.edu",
        "mailman_id": "013b724c0f5242a785b441fc3ae1038c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/013b724c0f5242a785b441fc3ae1038c/emails/"
    },
    "sender_name": "Nathaniel S. Parsons",
    "subject": "[amsat-bb]  Ridge Test Results",
    "date": "2008-04-22T03:06:42Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi again, everyone.\n\nIt's a little overwhelming to get so much help at once, but thank you,\neveryone, for all of it.\n\nOne clarification: I did indeed mean pF, not uF for the capacitors in the\nmatching circuit.\n\nAlso, we performed another ridge test this evening (another typo there: the\nridge is 3.18km from the roof where we have the ground station setup), using\nthe complete ground station (minus pre-amp), and TH-D7 with rubber duck.\n\nWe transmitted from the ground station, while varying the amount of\nattenuators between the TS-2000 and coax to the antenna. The \"PWR\" column is\nin the format (TH-D7)/(TS-2000).  With each test, two 319-byte packets were\nsent by the ground station in rapid succession. The results are below. If\nany of this is not clear, I will do my best to clarify things.\n\nAlso, the entire test was performed at 437.405MHz, at 1200 baud, even though\nwe would like to operate at 9600. I have gotten 9600 baud to work when two\nTH-D7's are across the room from each other, but since 9600 baud didn't work\nduring the initial configuration, we decided to just characterize the rubber\nduck at 1200.\n\nAnt. Pos.   PWR    Atten.   Packets\nVertical   .05W/5W  0dB       2/2\nVertical   .5W/5W   50dB      0/2\nVertical   .5W/5W   45dB      1/2\nVertical   .5W/5W   45dB      2/2\nVertical   .5W/5W   50dB      0/2\n\nHorizontal .5/5     50dB      0/2\nHorizontal .5/5     45dB      1/2\nHorizontal .5/5     45dB      0/2\nHorizontal .5/5     45dB      0/2\nHorizontal .5/5     45dB      0/2\nHorizontal .5/5     40dB      0/2\nHorizontal .5/5     40dB      0/2\nHorizontal .5/5     35dB      0/2\nHorizontal .5/5     30dB      2/2\nHorizontal .5/5     30dB      1/2\nHorizontal .5/5     30dB      2/2\n\n45 deg.    .5/5     30dB      2/2\n45 deg.    .5/5     30dB      2/2\n45 deg.    .5/5     35dB      2/2\n45 deg.    .5/5     40dB      2/2\n45 deg.    .5/5     45dB      1/2\n45 deg.    .5/5     45dB      0/2\n\nComments? Concerns? Questions?\n\nMy initial interpretation of these data is that our square loop antenna has\na MUCH lower gain than is required, and something like a short length of\nmeasuring tape would be a better substitute, as has been suggested by\nnumerous people.\n\n-Nate\n",
    "attachments": []
}